Worksheet comparing chemical and physical properties in physical science.

It looks like you've uploaded a worksheet titled "Chemical vs. Physical Properties" from a physical science class. The goal of the worksheet is to classify given properties as either chemical or physical, based on whether they change the substance's makeup or not.

Let’s go through the task step by step and solve it.

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🔍 Understanding the Definitions:

- Chemical Properties: These describe how a substance interacts with other substances to form new substances. They involve changes in the chemical composition (e.g., flammability, reactivity).

- Physical Properties: These can be observed or measured without changing the substance’s chemical identity (e.g., color, density, melting point).

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✔ Given List of Properties (from the left box):

1. color
2. smell
3. reactivity with water
4. boiling point
5. acidity
6. magnetic attraction or repulsion
7. rusting
8. heat of combustion (breaking down)
9. radioactivity

We need to classify each property as Chemical or Physical.

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🧪 Classification:

| Property | Type | Explanation |
|--------|------|-----------|
| Color | Physical | Can be seen without changing the substance. |
| Smell | Physical | Involves molecules evaporating but not changing chemically. |
| Reactivity with water | Chemical | Indicates a chemical reaction occurs (e.g., sodium + water → explosion). |
| Boiling point | Physical | Change of state (liquid → gas), no new substance formed. |
| Acidity | Chemical | Relates to ability to donate H⁺ ions; involves chemical behavior. |
| Magnetic attraction or repulsion | Physical | A physical force; does not alter the substance's chemistry. |
| Rusting | Chemical | Iron reacts with oxygen to form iron oxide — a new substance. |
| Heat of combustion (breaking down) | Chemical | Energy released when a substance burns (chemical reaction). |
| Radioactivity | Chemical | Nuclear decay changes the nucleus, thus altering the element (a chemical transformation at atomic level). |

> ⚠️ Note: While radioactivity involves nuclear changes (not typical chemical reactions), it is often classified under chemical properties in basic science education because it relates to the stability and behavior of atoms.

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✔ Final Answer:

Now, place each property into the correct box:

#### 🔹 Chemical Properties:
- Reactivity with water
- Acidity
- Rusting
- Heat of combustion (breaking down)
- Radioactivity

#### 🔹 Physical Properties:
- Color
- Smell
- Boiling point
- Magnetic attraction or repulsion

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✔ Completed Worksheet:

```
Chemical Properties
------------------
• Reactivity with water
• Acidity
• Rusting
• Heat of combustion (breaking down)
• Radioactivity

Physical Properties
-------------------
• Color
• Smell
• Boiling point
• Magnetic attraction or repulsion
```

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📝 Summary:

- Chemical properties involve reactions or transformations that create new substances.
- Physical properties are observable without changing the substance’s identity.

This classification helps scientists predict how materials will behave in different environments.

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